[GHC] #13475: Possible missing case in ghc-pkg

[GHC]

#13475: Possible missing case in ghc-pkg
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           Reporter:  Phyx-          |             Owner:  (none)
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:
          Component:  Package        |           Version:  8.1
  system                             |
           Keywords:                 |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  None/Unknown
  Unknown/Multiple                   |
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
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 I saw this while compiling

 {{{
 utils\ghc-pkg\Main.hs:761:25: Warning:
     Pattern match(es) are non-exhaustive
     In a case alternative: Patterns not matched: GhcPkg.DbOpenReadOnly
 }}}

 I don't know if this is indicative of a bug in the implementation or not?

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13475>
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